(50.28+548.245)*16.08*0.5*5.810
    12.862*（0.3857+4.6+19.29）+106.982*（2.071+19.29）+3243.430*7.357
    1/1.5391^2
    1.5391^2
    50000÷70.47×24.5%×100
    1.25*1.1*203.3595
    1.25*1.1*834.351
    1.25*1.1*119.61
    3＋2÷5
    2＋3÷5
    1/(1-e^0.5)
    e^0.5-1
    arctan3/4
    (126sin(0+5+15+80)cos5)/(210sin(0+5+5)cos80)
    arcsin((210sin5-466sin5)/256)
    126cos20-126cos132+68cos14-68cos80
    arcsin((108-126sin(112+20))/68)
    arcsin((110-126sin(112+20))/68)
    arcsin((110-125sin(0+20))/68)
    arcsin((108-125sin(0+20))/68)

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